Roundtop is a mountain in New York's Catskill Mountains, east-northeast of Roxbury in Delaware County. It stands within a cluster of nearby elevations and landforms, including Hack Flats to the west-southwest, Negro Hill to the north, and Bearpen Mountain to the southeast. As one of the named summits in this part of the Catskills, Roundtop helps define the rugged upland landscape around Roxbury. Its position among neighboring hills and flats places it firmly within the broader mountain terrain that characterizes this section of New York.